Tuesday, January 4, 2022

DIN 2391 Seamless Steel Tubes By wilsonpipeline.com

DIN 2391 Seamless Steel Tubes

Outside Diameter (Nominal Size ): 6 – 80 mm
Inside Diameter: 2 – 74 mm
Wall Thickness: 0,5 – 6 mm
Tolerances:
Outside Diameter:
OD 6 – 30 mm: ± 0,08 mm
OD 32 – 40 mm: ± 0,15 mm
OD 42 – 50 mm: ± 0,20 mm 
OD 55; 60 mm: ± 0,25 mm 
OD 65; 70 mm: ± 0,30 mm
OD 75; 80 mm: ± 0,35 mm 
Wall Thickness: ± 10%
Notes:

  1. Steel grades: St 35, St 45, St 52
  2. Length up to 9 m.
  3. Test certificates according to DIN EN 10204.
DIN 2391 Seamless Steel Tubes Sizes

Nominal Size, mm

Wall Thickness, mm

6; 7

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0

8

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5

9

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8

10; 12

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0

14; 15; 16; 18

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5

20; 22

0,5; 0,8; 1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5

25; 26; 28; 30

1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0

32; 35; 38; 40

1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0

42; 45; 48; 50

1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0

55; 60; 65

1,5; 1,8; 2,0; 2,2; 2,5; 2,8; 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0

70; 75; 80

3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0


Mechanical properties Of DIN 2391 Seamless Steel Tubes

Steel Grade

Tensile Strength, N/mm2 (min)

Yield Strength, N/mm2 (min)

Elongation, % (min)

NBK

RSt 34-2

210 – 410

205

28

RSt 37-2

340 – 470

235

25

St 44-2

410 – 540

255

21

BK

RSt 34-2

460

6

RSt 37-2

490

6

St 44-2

290 – 310

5

GBK

RSt 34-2

300

28

RSt 37-2

315

25

St 44-2

390

21


Chemical Composition (%, max) Of DIN 2391 Seamless Steel Tubes

Steel Grade

C

Si

Mn

S

P

RSt 34-2

0,15

0,30

0,60

0,025

0,025

RSt 37-2

0,17

0,30

0,70

0,025

0,025

St 44-2

0,21

0,30

1,1

0,025

0,025

APPLICATIONS:  

1. Petrochemical industry

2. Pharmaceutical industry 

3. Food industry

4. Aviation and aerospace industry

5. Architectural decoration industry

6. Gas and Oil

Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

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